noun 下载 🔗分享 质粒, 环状DNA。 A loop of double-stranded DNA that is separate from and replicates independently of the chromosomes, most commonly found in bacteria, but also in archaeans and eukaryotic cells, and used in genetic engineering as a vector for gene transfer. Examples : "Scientists used a plasmid to insert a new gene into the bacteria, allowing them to produce a more effective antibiotic. " 科学家们利用质粒将一个新基因插入细菌体内,使这些细菌能够产生更有效的抗生素。 biology biochemistry microorganism medicine science technology 与AI对话词汇游戏阅读练习